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2025-07-02vsock/test: Add test for null ptr deref when transport changesLuigi Leonardi
Add a new test to ensure that when the transport changes a null pointer dereference does not occur. The bug was reported upstream [1] and fixed with commit 2cb7c756f605 ("vsock/virtio: discard packets if the transport changes"). KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067] CPU: 2 UID: 0 PID: 463 Comm: kworker/2:3 Not tainted Workqueue: vsock-loopback vsock_loopback_work RIP: 0010:vsock_stream_has_data+0x44/0x70 Call Trace: virtio_transport_do_close+0x68/0x1a0 virtio_transport_recv_pkt+0x1045/0x2ae4 vsock_loopback_work+0x27d/0x3f0 process_one_work+0x846/0x1420 worker_thread+0x5b3/0xf80 kthread+0x35a/0x700 ret_from_fork+0x2d/0x70 ret_from_fork_asm+0x1a/0x30 Note that this test may not fail in a kernel without the fix, but it may hang on the client side if it triggers a kernel oops. This works by creating a socket, trying to connect to a server, and then executing a second connect operation on the same socket but to a different CID (0). This triggers a transport change. If the connect operation is interrupted by a signal, this could cause a null-ptr-deref. Since this bug is non-deterministic, we need to try several times. It is reasonable to assume that the bug will show up within the timeout period. If there is a G2H transport loaded in the system, the bug is not triggered and this test will always pass. This is because `vsock_assign_transport`, when using CID 0, like in this case, sets vsk->transport to `transport_g2h` that is not NULL if a G2H transport is available. [1]https://lore.kernel.org/netdev/Z2LvdTTQR7dBmPb5@v4bel-B760M-AORUS-ELITE-AX/ Suggested-by: Hyunwoo Kim <v4bel@theori.io> Suggested-by: Michal Luczaj <mhal@rbox.co> Signed-off-by: Luigi Leonardi <leonardi@redhat.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Link: https://patch.msgid.link/20250630-test_vsock-v5-2-2492e141e80b@redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-07-13test/vsock: add install targetPeng Fan
Add install target for vsock to make Yocto easy to install the images. Signed-off-by: Peng Fan <peng.fan@nxp.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Link: https://patch.msgid.link/20240710122728.45044-1-peng.fan@oss.nxp.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-10-15test/vsock: io_uring rx/tx testsArseniy Krasnov
This adds set of tests which use io_uring for rx/tx. This test suite is implemented as separated util like 'vsock_test' and has the same set of input arguments as 'vsock_test'. These tests only cover cases of data transmission (no connect/bind/accept etc). Signed-off-by: Arseniy Krasnov <avkrasnov@salutedevices.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2023-10-15test/vsock: MSG_ZEROCOPY support for vsock_perfArseniy Krasnov
To use this option pass '--zerocopy' parameter: ./vsock_perf --zerocopy --sender <cid> ... With this option MSG_ZEROCOPY flag will be passed to the 'send()' call. Signed-off-by: Arseniy Krasnov <avkrasnov@salutedevices.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2023-10-15test/vsock: MSG_ZEROCOPY flag testsArseniy Krasnov
This adds three tests for MSG_ZEROCOPY feature: 1) SOCK_STREAM tx with different buffers. 2) SOCK_SEQPACKET tx with different buffers. 3) SOCK_STREAM test to read empty error queue of the socket. Patch also works as preparation for the next patches for tools in this patchset: vsock_perf and vsock_uring_test: 1) Adds several new functions to util.c - they will be also used by vsock_uring_test. 2) Adds two new functions for MSG_ZEROCOPY handling to a new source file - such source will be shared between vsock_test, vsock_perf and vsock_uring_test, thus avoiding code copy-pasting. Signed-off-by: Arseniy Krasnov <avkrasnov@salutedevices.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2023-08-03test/vsock: remove vsock_perf executable on `make clean`Stefano Garzarella
We forgot to add vsock_perf to the rm command in the `clean` target, so now we have a left over after `make clean` in tools/testing/vsock. Fixes: 8abbffd27ced ("test/vsock: vsock_perf utility") Cc: AVKrasnov@sberdevices.ru Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Reviewed-by: Simon Horman <horms@kernel.org> Tested-by: Simon Horman <horms@kernel.org> # build-tested Link: https://lore.kernel.org/r/20230803085454.30897-1-sgarzare@redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-01-12test/vsock: vsock_perf utilityArseniy Krasnov
This adds utility to check vsock rx/tx performance. Usage as sender: ./vsock_perf --sender <cid> --port <port> --bytes <bytes to send> Usage as receiver: ./vsock_perf --port <port> --rcvlowat <SO_RCVLOWAT> Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2019-12-20VSOCK: add AF_VSOCK test casesStefan Hajnoczi
The vsock_test.c program runs a test suite of AF_VSOCK test cases. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-20VSOCK: extract utility functions from vsock_diag_test.cStefan Hajnoczi
Move useful functions into a separate file in preparation for more vsock test programs. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-20VSOCK: fix header include in vsock_diag_testStefan Hajnoczi
The vsock_diag_test program directly included ../../../include/uapi/ headers from the source tree. Tests are supposed to use the usr/include/linux/ headers that have been prepared with make headers_install instead. Suggested-by: David S. Miller <davem@davemloft.net> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-21treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner
Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-10-05VSOCK: add tools/testing/vsock/vsock_diag_testStefan Hajnoczi
This patch adds tests for the vsock_diag.ko module. These tests are not self-tests because they require manual set up of a KVM or VMware guest. Please see tools/testing/vsock/README for instructions. The control.h and timeout.h infrastructure can be used for additional AF_VSOCK tests in the future. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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